IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma 78962-8
LOINC Code
| LOINC code | 78962-8 | ||
|---|---|---|---|
| name | IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma | ||
| description | The ratio of IgG to transferrin clearances, the selectivity index, is useful in the diagnosis and management of proteinuria. Both IgG and transferrin levels are measured in serum and urine and the selectivity index (SI) is calculated according to the formula of Cameron and Blandford where SI = (uIgG/sIgG)/(uTf/sTf) or (uIgG/sIgG * sTf/uTf).[PMID: 4161419] An index of below 0.1 is indicative of highly selective proteinuria.[PMID: 11012907] | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | IgG clearance/Transferrin clearance | ||
| property | Ratio | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Urine+Ser/Plas Ser = Serum Plas = Plasma | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | |||
Additional Names | |||
| short name | IgG/Transf clear Ur+SerPl-Rto | ||
Basic Attributes | |||
| class | CHEM | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
| formula (readable) | Selectivity index (SI) = (uIgG/sIgG)/(uTf/sTf) | ||
| example UCUM units | {ratio} The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | ratio | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
History/Usage | |||
| first released | |||
| last updated | 2.54 | ||
| last change type | ADD - added | ||
Related Names | |||
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